Django：在 Docker 容器中运行时找不到模块

Question

我在 Docker 容器中运行一个 Django 项目，我想添加一个模块（具体来说，django-prometheus）

我成功运行了：pip install django-prometheus 和 docker run -p 9090:9090 prom/prometheus，并对我的 settings.py 和 urls.py 文件进行了必要的更改，如 specified in the README

然后我重建项目并重新启动它，但它给了我错误ModuleNotFoundError: No module named 'django_prometheus'

（完整的错误报告：

Traceback (most recent call last):
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
api_1           |     worker.init_process()
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/workers/base.py", line 129, in init_process
api_1           |     self.load_wsgi()
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/workers/base.py", line 138, in load_wsgi
api_1           |     self.wsgi = self.app.wsgi()
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/app/base.py", line 67, in wsgi
api_1           |     self.callable = self.load()
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 52, in load
api_1           |     return self.load_wsgiapp()
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
api_1           |     return util.import_app(self.app_uri)
api_1           |   File "/usr/local/lib/python3.7/site-packages/gunicorn/util.py", line 350, in import_app
api_1           |     __import__(module)
api_1           |   File "/usr/src/app/project/wsgi.py", line 16, in <module>
api_1           |     application = get_wsgi_application()
api_1           |   File "/usr/local/lib/python3.7/site-packages/django/core/wsgi.py", line 12, in get_wsgi_application
api_1           |     django.setup(set_prefix=False)
api_1           |   File "/usr/local/lib/python3.7/site-packages/django/__init__.py", line 24, in setup
api_1           |     apps.populate(settings.INSTALLED_APPS)
api_1           |   File "/usr/local/lib/python3.7/site-packages/django/apps/registry.py", line 89, in populate
api_1           |     app_config = AppConfig.create(entry)
api_1           |   File "/usr/local/lib/python3.7/site-packages/django/apps/config.py", line 90, in create
api_1           |     module = import_module(entry)
api_1           |   File "/usr/local/lib/python3.7/importlib/__init__.py", line 127, in import_module
api_1           |     return _bootstrap._gcd_import(name[level:], package, level)
api_1           | ModuleNotFoundError: No module named 'django_prometheus'
api_1           | [2019-07-01 12:19:36 +0200] [16] [INFO] Worker exiting (pid: 16)

)

在我添加此模块之前，项目运行良好，我缺少什么？

Answer 1

在你的 Dockerfile 中，你应该确保你有一个 pip install 命令。请看下面的例子。 prometheus 模块应该列在 requirements.txt 文件中。

RUN apt-get update \
&& apt-get install -y --no-install-recommends software-properties-common \
&& apt-get update \
&& apt-get install -q -y --no-install-recommends python3 python3-dev python3-pip python3-setuptools python3-wheel gcc \
&& apt-get install -q -y vim \
&& apt-get clean 

ADD requirements.txt /app/requirements.txt
RUN pip3 install -r /app/requirements.txt

# Add the application source code.
ADD . /app